Do not turn off your computer or disconnect from the power source while updating the BIOS as this could harm your computer. During the update, your computer will restart and you may briefly see a black screen.

Before updating, please read the installation instructions and important information noted below.

Dell Latitude 3420/3520 System BIOS

Restart required AUTO INSTALLED This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.
This package contains the Dell system BIOS update. BIOS is a firmware package that is embedded on a small memory chip on the system board. It controls the keyboard, monitor, disk drives, and other devices. This update addresses Common Vulnerabilities and Exposures (CVE). Common Vulnerabilities and Exposures (CVE) is a list of security vulnerabilities and exposures that are publicly disclosed.
To view all drivers for your Latitude 3420, go to Drivers and downloads.
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Latitude_3420_Latitude_3520_1.25.1.exe | 63.75 MB
Enter the Service Tag of your device to check the compatibility of this download with your device.
This is a large file. Depending on your connection speed, it may take some time to download.
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File Format: CPG BIOS Executable for Windows/DOS
File Name: Latitude_3420_Latitude_3520_1.25.1.exe
File Size: 63.75 MB
Format Description
This file format consists of a BIOS executable file. The Universal (Windows/MS DOS) format can be used to install from any Windows or MS DOS environment.
To ensure the integrity of your download, please verify the checksum value.
MD5:
9e6d2986a7b868202eeef4fb9d03211f
SHA1:
538ea6fd5cf0ab44fa9d3c5ad51b80c54a60c5ae
SHA-256:
ff6193df4bbf201d6ac79f66efa5311a0322227dfb3af676b57a42086ad2fac1

Find more updates. Use SupportAssist to find all the latest driver updates for your device.

Fixes & Enhancements

- Firmware updates to address security vulnerabilities including (Common Vulnerabilities and Exposures - CVE) such as CVE-2022-46752, CVE-2022-30704, and CVE-2022-30339.
- Fixed the issue where the Dell logo is displayed incorrectly when the system boots to the operating system and the system lid is closed.
- Fixed the issue where the system auto wakes up on days not selected by you in the Auto On Time function in the BIOS setup.
- Fixed the issue where the system cannot boot after the BIOS update.
- Fixed the issue where the Show Password option is not displayed under the Wireless Networks in the BIOS setup.
Read More

Version

1.25.1, 1.25.1

Release date

18 Jan 2023

Download Type

System BIOS

Category

BIOS

Importance

Critical
Dell Technologies highly recommends applying this important update as soon as possible. The update contains critical bug fixes and changes to improve functionality, reliability, and stability of your Dell system. It may also include security fixes and other feature enhancements.
View Important Information
File Format: BIOS Recovery Image File
File Name: BIOS_IMG.rcv
File Size: 63.75 MB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file format consists of a BIOS Recovery image file. This file is used for the System BIOS Recovery process to recover a system from a corrupted BIOS.
To ensure the integrity of your download, please verify the checksum value.
MD5:
9e6d2986a7b868202eeef4fb9d03211f
SHA1:
538ea6fd5cf0ab44fa9d3c5ad51b80c54a60c5ae
SHA-256:
ff6193df4bbf201d6ac79f66efa5311a0322227dfb3af676b57a42086ad2fac1

By downloading, you accept the terms of the Dell Software License Agreement.

Additional details

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- Once the BIOS is upgraded to version 1.16.1 and later, you cannot downgrade the BIOS to version 1.15.1 and earlier, due to downgrade restrictions. BIOS downgrades are restricted when there are security updates and important fixes with earlier versions that impact the functionality of the system.
- BIOS updates take no more than 5 minutes to be installed on your system. You can install the updates in the background while using the system.
1.35.007 Mar 2024
1.34.001 Feb 2024
1.33.012 Dec 2023
1.32.114 Nov 2023
1.31.013 Sep 2023
1.30.011 Jul 2023
1.29.009 Jun 2023
1.27.007 Apr 2023
1.26.007 Mar 2023
1.23.207 Nov 2022
1.20.009 Aug 2022
1.19.012 Jul 2022
1.18.014 Jun 2022
1.17.405 May 2022
1.16.108 Apr 2022
1.15.104 Mar 2022
1.14.107 Jan 2022
1.13.309 Dec 2021
1.12.010 Nov 2021
1.11.017 Sep 2021
1.10.127 Aug 2021
1.9.226 Aug 2021
1.9.126 Aug 2021
1.8.023 Jun 2021
1.5.007 Jun 2021
1.3.106 May 2021
1.2.014 Apr 2021
1.1.030 Mar 2021
1.0.329 Mar 2021
1.0.029 Mar 2021
Dell Latitude 3420/3520 System BIOS
Updating the BIOS from Windows

Note 1: Before updating the BIOS, ensure that you suspend BitLocker encryption on a BitLocker-enabled system. If BitLocker is not enabled on your system, you can ignore this step. For information about how to disable BitLocker, see How to Enable or Disable BitLocker with TPM in Windows at support.dell.com.
Note 2: Do not turn off power or interrupt the BIOS update process during the update.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.

Download and Installation
1. Click Download File.
2. Click Save to save the file to your hard drive.
3. Browse to the location where you downloaded the file.
4. Double-click the file.
5. Click Yes to open the BIOS update utility.
6. Click Update to initiate the update process. A progress bar is displayed.
7. Click Restart to restart the system once the progress bar reaches 100%.
The update process initiates at the Dell logo and an update initiation message is displayed with a progress bar. After the update finishes, the system automatically restarts.

Updating the BIOS from BIOS Boot Menu (independent of operating system)

Note 1: Before updating the BIOS, ensure that you suspend BitLocker encryption on a BitLocker-enabled system. If BitLocker is not enabled on your system, you can ignore this step. For information about how to disable BitLocker, see How to Enable or Disable BitLocker with TPM in Windows at support.dell.com.
Note 2: Do not turn off the power or interrupt the BIOS update process during the update.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.

Installation
1. Copy the downloaded file to a USB drive. You do not need a bootable USB drive.
2. Insert the USB drive into any USB port.
3. Power on the system.
4. At the DELL logo screen, press F12 to access the one-time boot menu.
5. Select BIOS Flash Update in the Other Options section.
6. Click the ... button to browse the USB drive to locate the downloaded file.
7. Select the file and click Ok.
8. Verify the existing system BIOS information and the BIOS update information.
9. Click Begin Flash Update.
10. Review the Warning message and click Yes to proceed with the update.
The system restarts and displays a Flash Progress bar at the Dell logo screen. The system restarts again when the Flash update is complete.

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting and usage guide.

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